CVE-2026-80627

In the Linux kernel, the following vulnerability has been resolved:

MIPS: mm: Fix out-of-bounds write in maar_res_walk()

maar_res_walk() uses wi->num_cfg as the index into the fixed-size

wi->cfg array, but checks whether the array is full only after it has

filled the selected entry. If walk_system_ram_range() reports more than

16 memory ranges, the overflow call writes one struct maar_config past

the end of the array before WARN_ON() prevents num_cfg from advancing.

Move the full-array check before taking the array slot and return non-zero

when the scratch array is full, so walk_system_ram_range() terminates the

walk instead of invoking the callback for further ranges.